There are several advantages of having a fill valve cap. Let’s take you step by step, type by type, and find the best fill valve cap for you.

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Our Top Picks:

Best Overall: Buy: Kohler Correct Part READ REVIEW

Best For Stainless Steel: Buy: Korky Toilet Repair Fill Valve Cap READ REVIEW

Best For Adjustable Height: Buy: Kohler Fill Valve Cap READ REVIEW

Best For Diy Installation: Buy: Toto Fill Valve Cap READ REVIEW

Best For Low Cost: Buy: Korky Fill Valve Cap READ REVIEW

Best For Water Hammer: Buy: Korky Innovative Adjustment READ REVIEW

Best For Dual Flush Valve: Buy: Danco Fill Valve Cap READ REVIEW

Best For Fast Fill: Buy: Plumb Craft Fill Valve Cap READ REVIEW

Best For Durable Materials: Buy: Fluidmaster Fill Valve Cap READ REVIEW

Best Overall: Kohler Correct Part

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Here, we present a cap that manages to win our hearts. It's the Kohler Correct Part and it's widely considered as one of the best caps you can buy. The kohler correct part provides a gracious experience by filling the tank quietly. Replace your old or leaky fill valve with an oem kohler part. Also, this worked perfectly, works well with an easy 5 minute install and it is great for about 10 mins.

The cap is designed by kohler engineers to maintain original product performance and promote product longevity. Also, it fills fast, it is fairly simple and has a great design. Most importantly, the kohler correct part fits perfectly and it is great for a great price.

Most customers quickly discovered that the cap allows water to get in there. Furthermore, a few also found that the cap looked like someone had tampered with the original contents.

• This fits kohler toilets and it is back to hush quiet.
• This is easy to install by hand, (no tools needed), well-made, and durable.
• Confirm shank color to determine the correct part.
• This is perfect for kohler one piece low - flow toiltets.

Best For Stainless Steel: Korky Toilet Repair Fill Valve Cap

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The Korky Toilet Repair Fill Valve Cap's superior materials makes sure that it ages well with use. The korky toilet repair fill valve cap would be perfect with product description and it stops the leaks. Make sure this fits by entering your model number. The korky toilet fill valve replacement cap fits korky quietfill, platinum and toto fill valves.

Lastly, the korky toilet repair fill valve cap is flexible and straight forward.

Almost all customers quickly discovered that the cap fits the bill (toilet) and fixed the problem. In addition, a few strongly agree that the cap fits and it works, but it has since changed the whole assembly anyway. Also, a few say that the cap can be used on the toilet.

• Fits hunter 528 and Toto fill valves.
• This has fixed the problem, it works well for straight - forward install and has a great design.
• This is great with easy valve repair, is blue and it stopped the leaking.
• This will easily come off when the hose connector is facing the back wall.

Best For Adjustable Height: Kohler Fill Valve Cap

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Compared with other caps in this category, the Kohler Fill Valve Cap has a convenient design. The kohler fill valve cap worked perfectly and it makes it much quieter. Confirm shank color to determine the correct part. And, this is made for perfect operation, is blue and it is great for a great price.

The cap is reliable and it is designed for perfect match. Above all, the kohler fill valve cap is great for high quality, It is perfect for great quality and has a great design.

Most customers found that the cap is easy to adjust, exact replacement, all parts needed were included. Further, they strongly agree that the cap is a 5 minute install and it works perfectly. Further, a few say that the only tricky part is the last step connecting to the main water line.

• This is identical to a fluidmaster 400a.
• This works fine, it is used for best value and works as designed.
• This fits, this part is going to be interchangeable.
• This is used to replace an older kohler fill valve.

Best For Diy Installation: Toto Fill Valve Cap

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We would, of course, be remiss if we didn't mention that we filling the valve cap for daily purpose. The Toto Fill Valve Cap allows for perfect fit replacement, It is great for a great price and works as designed. Make sure this fits by entering your model number. Moreover, this provides great value, fixed the toilet and it is easy to change.

The cap is good for daily installation, It is blue and has a great design. Lastly, the toto fill valve cap is made for easy installation, is built for adjustable height and it allows for easy top install.

Most customers agree that the cap is easy to follow and all the parts needed were included. Further, a few strongly agree that the cap is easy to install, and doesn't leak. Moreover, a few also found that the cap works well, but some of the plastic parts are flimsy. Consequently, customers were very happy to recommend it to friends and families.

• This fits and works perfectly to add to that, it is a perfect first attempt.
• This fixed the problem and it comes with good documentation.
• This has a leaking / hissing toilet.
• This works well as a replacement, easy to install.

Best For Low Cost: Korky Fill Valve Cap

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The Korky Fill Valve Cap has killer features for the price point. The korky fill valvecap is perfect for simple installation, comes with clear instructions, It is brand new and has a modern design. The manufacturer says: Our repair parts are easy to install & made exclusively from long - lasting chlorazone red rubber. Also, the cap comes with excellent customer service and it adjusts easily.

The cap has a universal design to fit all brands and features a wide range of adjustability to fit most 2-piece and 1-piece toilets. In addition, it is great and easy to install and it fixes problems. Most importantly, the korky fill valve cap was installed today, It works great and has a very clever design.

Almost all customers quickly discovered that the cap was made with cheap Mexican labor. Also, they also found that the cap reduces noises when flushing water. In addition, they say that this unit has a very large range of adjustment and is very easy to quickly tune up. So, buyers were eager to recommend it to friends and families.

• This is going to last a lot longer.
• This is an improvement over the 30+ year old technology fluidmaster imho.
• It takes about 10 minutes to change.
• The manufacturer says: Our products are designed and manufactured in Wisconsin.

Best For Water Hammer: Korky Innovative Adjustment

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Compared with other caps in this category, the Korky Innovative Adjustment has a convenient design. The korky innovative adjustment comes with replacement toilet parts and it is flexible. The Manufacturer says: We offer a full line of both universal and specific-fit repair parts, so no matter what type or age of your toilet you have, we have a solution for you. Also, this would be perfect with product description and I installed it today.

The cap fits two fill valves and is designed to replace g-max and power gravity toilets. Above all, the korky innovative adjustment worked perfectly, fit perfectly and it was made with good instructions.

Almost all buyers quickly discovered that the cap works in the standard toto system, but will not work with the max flushing system. Moreover, they strongly agree that the cap is perfect and functions well. In conclusion, at the price, they believe that they got a steal of a deal with it.

• This is an excellent, widely-used valve.
• This is not compatible with PVC flex supply.
• This allows for fast fill and it allows for great fit.
• This is working and that's great for now.

Best For Dual Flush Valve: Danco Fill Valve Cap

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The Danco Fill Valve Cap should be able to handle its purpose and duties with ease. The danco fillvalve cap fixed the problem, is better than most, It installed easily and has a smart design. Strong jets stir up debris in the toilet tank in order to rush any dirt down the drain with every flush, keeping your toilet tank cleaner. And, the cap is great for dual flush valves and it installed easily.

Finally, the danco fill valve cap is blue and it is overall.

Most buyers found that the cap is used to have ripples for several seconds even after the filling is stopped. And, they strongly agree that the cap does not hold a consistently accurate water level. Further, they strongly agree that the sound of the flush is a little different than normal because of the tank cleaning tube feature.

• This saves water, it comes with good instructions and has a very clever design.
• This is used for items they are trying to move.
• This is very simple, works as expected, it works as advertised and has an elegant design.
• Easy installation: smart nut helps with easy installation without tools in most standard toiletes.

Best For Fast Fill: Plumb Craft Fill Valve Cap

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If you often find yourself confused about the appropriate and satisfactory cap, Plumb Craft Fill Valve Cap is your solution. The plumb craft fill valvecap includes 6 color coded water flow adjustment caps to adjust water savings up to 38 percent. This ensures your toilet gets just the right amount of water, providing a powerful flush while maintaining a fast and quiet fill. And, it has tightened stuff a bit, is designed for easy fix and it is very sturdy.

The cap fits well and it works as advertised. In addition, it includes water flow adjustment caps to save money and up to 38% more water with each toilet flush. Finally, the plumb craft fill valve cap is made for a good replacement fill valve and it is great for a fair price.

Almost all customers opine that the cap is easy to install and adjust the water level in the tank. Moreover, they strongly agree that the cap can be made with the screw type adjuster after the valve is installed in the tank. In addition, they also found that the part is strong enough to shutoff presurized water when the toilet tank is full. Overall, most buyers call the cap functionally comfort, and no one questions it.

• It is packaged in cardboard, which makes it really easy to access.
• Manufacturer says: our anti-siphon fill valve features patented after installation adjustment from 8"-13.
• This is much more, is flexible, it is made quality and has a great design.
• Prevents running - includes quick action water shut-off that prevents toilets from continuously running.

Best For Durable Materials: Fluidmaster Fill Valve Cap

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The Fluidmaster Fill Valve Cap's high-end materials makes sure that it ages well with use. The fluidmaster fillvalve cap is designed for easy fix, works fine and it stopped the leak. The universal fluidmaster 400a toilet fill valve cap replaces dirty, worn fill valve caps that may cause your toilet to fill slowly or with excessive noise. Also, the cap is made with flush valves and it is made with a product description.

The cap is made of durable materials that resist corrosion. Lastly, the fluidmaster fill valve cap comes from manufacturing facilities across the world, Fluidmaster reaches over 90 countries worldwide with unparalleled quality.

Almost all buyers opine that the cap is easy to install, shut off water, remove the float connector, twist to remove, it it slightly open the valve to flush, then reinstall. Also, they also found that the cap assembly is easy to replace and makes the fill valve look new. In short, buyers found this to be one of the best cap for daily purposes.

• This is one of the best toilet repair brands in the world.
• This is great as a replacement cap for all fluidmaster 400 series fill valves.
• This has a fill valve assembly and it is easy to use.